Reference

Class rules

3 articles on class rules, covering 12 symptoms. Basis, stated on each: 3 rulebook. Reviewed by a racer: 0 of 3.

• Vintage Ski against Vintage Ski Limited, the same ski and opposite answers

  Two IJSBA classes run the same Kawasaki 550 cases in the same hull and disagree on twenty three components. It is the clearest demonstration on this site that a part is not legal or illegal on its own, only in a class.

  Engine out · 4 symptoms

• What is actually legal in IJSBA Ski Lites

  Ski Lites is a closed list, so the question is not what the rulebook bans but what it names. Three answers catch people out at tech inspection, and one of them makes the most wanted part on this site illegal in the class.

  Bolt-on · 4 symptoms

• What is legal in UIM Ski GP3, and what the rulebook does not say

  GP3 is the strictest exhaust rule in the UIM Ski Division and one of the plainest closed lists in the sport. The harder half is what the class leaves unstated, including a power ceiling with no stated way to measure it.

  Intermediate · 4 symptoms